W-doped NiO nanotubes (NTs) were successfully synthesized for efficient sensing of ethanol vapor using a low cost and economical electrospinning method. The response (resistance ratio) of sensor based on 4% W-NiO NTs to100 ppm ethanol is as high as 40.56 at 200 °C, which is 10 times higher than that of pure NiO sensor. This significant enhancement in sensor response can be attributed to the change in morphology, increase in oxygen vacancies, and the decrease in hole concentration in NiO by W doping. Based on the adsorption and desorption theory of oxygen, we also demonstrated that the atmospheric oxygen content can improve the sensor response and shorten the response time by increasing the amount of adsorbed oxygen.

钨掺杂的NiO纳米管（NTs）已成功合成，以低成本和经济的静电纺丝方法有效地感测乙醇蒸气。基于4％W-NiO NTs的传感器对100 ppm乙醇的响应（电阻比）在200°C时高达40.56，这是纯NiO传感器的响应的10倍。传感器响应的这种显着增强可归因于形态变化，氧空位的增加以及W掺杂导致NiO中空穴浓度的降低。根据氧气的吸附和解吸原理，我们还证明了大气中的氧气含量可以通过增加氧气的吸附量来改善传感器响应并缩短响应时间。